Malware Analysis Report

2024-11-16 13:41

Sample ID 240531-pp4j1agh9w
Target sigmasoft-0.1xw.exe
SHA256 1e860af19f9769079667c6537fe731cafb56211de7351df9a3b61b2818d5069a
Tags
xworm execution persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1e860af19f9769079667c6537fe731cafb56211de7351df9a3b61b2818d5069a

Threat Level: Known bad

The file sigmasoft-0.1xw.exe was found to be: Known bad.

Malicious Activity Summary

xworm execution persistence rat trojan

Detect Xworm Payload

Xworm family

Xworm

Command and Scripting Interpreter: PowerShell

Executes dropped EXE

Drops startup file

Checks computer location settings

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 12:31

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm family

xworm

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-31 12:31

Reported

2024-05-31 12:33

Platform

win10v2004-20240508-en

Max time kernel

127s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\svchost.exe N/A
N/A N/A C:\ProgramData\svchost.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe" C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost.exe N/A
Token: SeDebugPrivilege N/A C:\ProgramData\svchost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4028 wrote to memory of 2960 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 2960 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 3456 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 3456 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 2596 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 2596 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4028 wrote to memory of 1400 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe
PID 4028 wrote to memory of 1400 N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sigmasoft-0.1xw.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\ProgramData\svchost.exe"

C:\ProgramData\svchost.exe

C:\ProgramData\svchost.exe

C:\ProgramData\svchost.exe

C:\ProgramData\svchost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 73.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
BE 88.221.83.184:443 www.bing.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 184.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 never-knowledge.gl.at.ply.gg udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/4028-0-0x00007FFA94B33000-0x00007FFA94B35000-memory.dmp

memory/4028-1-0x0000000000DA0000-0x0000000000DB8000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vdlblxvr.ayj.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2960-7-0x000002867F6E0000-0x000002867F702000-memory.dmp

memory/2960-12-0x00007FFA94B30000-0x00007FFA955F1000-memory.dmp

memory/2960-13-0x00007FFA94B30000-0x00007FFA955F1000-memory.dmp

memory/2960-14-0x00007FFA94B30000-0x00007FFA955F1000-memory.dmp

memory/2960-17-0x00007FFA94B30000-0x00007FFA955F1000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 6d42b6da621e8df5674e26b799c8e2aa
SHA1 ab3ce1327ea1eeedb987ec823d5e0cb146bafa48
SHA256 5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c
SHA512 53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 da5c82b0e070047f7377042d08093ff4
SHA1 89d05987cd60828cca516c5c40c18935c35e8bd3
SHA256 77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5
SHA512 7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 eb1ad317bd25b55b2bbdce8a28a74a94
SHA1 98a3978be4d10d62e7411946474579ee5bdc5ea6
SHA256 9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98
SHA512 d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

memory/4028-56-0x00007FFA94B30000-0x00007FFA955F1000-memory.dmp

memory/4028-57-0x00007FFA94B33000-0x00007FFA94B35000-memory.dmp

memory/4028-58-0x00007FFA94B30000-0x00007FFA955F1000-memory.dmp

C:\ProgramData\svchost.exe

MD5 c376c6af503504eba91372ebc3afb500
SHA1 283eeb9839d0e60fff06bae959c8f064d98e5b72
SHA256 1e860af19f9769079667c6537fe731cafb56211de7351df9a3b61b2818d5069a
SHA512 bb4b600bf8da4a8f004043c3008dd7770c479a1d453846026e6e2d983156ecdeca344d403092e67783ff798e2610a0584117fb707e3406e678f231319d1c59f1

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\svchost.exe.log

MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-31 12:31

Reported

2024-05-31 12:31

Platform

win7-20240221-en

Max time kernel

0s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe

"C:\Users\Admin\AppData\Local\Temp\sigmasoft-0.1xw.exe"

Network

N/A

Files

memory/2024-0-0x000007FEF58F3000-0x000007FEF58F4000-memory.dmp

memory/2024-1-0x0000000000E00000-0x0000000000E18000-memory.dmp